Delta Cassiopeiae

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Delta Cassiopeiae (δ Cas / δ Cassiopeiae) is a star in the constellation Cassiopeia. It also has the traditional names Ksora and Ruchbah, derived from an Arabic word ركبة rukbah meaning "knee".

Delta Cassiopeiae is an eclipsing binary with a period of 759 days. Its apparent magnitude varies between +2.68 mag and +2.74 with a period of 759 days. It is of spectral class A3, and is approximately 99 light years from Earth.

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